The anatomical structure, mechanical environment, and functional requirements of the knee joint make it one of the most frequently damaged joints. Knee joint is not only because of its complex structure but also because of its complex biomechanical properties.
Therefore, in order to make better prevention and rehabilitation plans or provide a scientific basis for researchers, it is necessary to study its pathogenesis. Different types and degrees of knee injuries have seriously affected athletes’ training and sports performance. According to the analysis of 2725 cases of sports injuries in various sports events by the Institute of Sports Medicine, knee injuries accounted for 25.82%, accounting for the first of all sports injuries. More and more people are aware of its importance and related diseases, and their research is getting deeper and deeper. As the largest and most complex joint of the human body, knee joint is located between the hip joint and ankle joint, and it is the hub of lower limb activities. This method proves that the intelligent finite element algorithm can effectively solve the modeling problem of sports injury of the anterior cruciate ligament.
Thus, the three-dimensional finite element model of the knee joint highly simulates the structure and material properties of the knee joint.
However, the stress values at the tibial attachment area are 9.80, 13.8, and 13.93 MPa, respectively, and the stress values at the anterolateral part of the middle ligament are 6.36, 11.89, and 12.26 MPa, respectively, which are all smaller than those at the femoral attachment area, which also quantitatively explains the clinical phenomenon that ACL fracture often occurs in the femoral attachment area in practice. The experimental results show that, in models 1, 2, and 3, the maximum stress values appear in the posterolateral of the femoral attachment area of the ligament, which are 16.24 MPa, 16.36 MPa, and 22.05 MPa, respectively. The same ligament constitutive equation was used to fit the parameters of stress-strain mechanical experimental curves of three different anterior cruciate ligaments, and the effects of different anterior cruciate ligament mechanical parameters on kinematics and biomechanical properties of the knee joint were compared. Considering the transverse isotropy of the ligament, this paper constructs a 3D finite element model of the knee joint based on medical image data. In order to solve the problem of sports injury modeling of the anterior cruciate ligament, a method based on the intelligent finite element algorithm is proposed.
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